1.6A Linear Li-Ion Battery Charger in 3x3 TDFN

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Manufacturer Skyworks


Description :

The AAT3696 BatteryManager™ is a single-cell lithium-ion (Li-Ion)/Li-Polymer battery charger IC designed to operate from USB ports or AC adapter up to an input voltage of 6.5V or 6.05V (depending on the option¹). For increased safety, the AAT3696 also includes over-voltage input protection (OVP) up to 28V. The AAT3696 precisely regulates battery voltage after it has reached 4.2V or 4.375V (depending on the option¹) Li-Ion/Polymer battery cells through an extremely low RDS(ON) switch. The charging current can be set by an external resistor up to 1.6A. In case an over-voltage condition occurs from the input, a series switch quickly opens and a fault flag is activated to prevent damage to the battery and charging circuitry. Other fault conditions are monitored in real time. In case of an over-current, battery over-voltage, short circuit, or over-temperature failure, the device will automatically shut down, thus protecting the charging device, control system, and the battery under charge. A status monitoring output pin (STAT) is provided to indicate charging activity. This open-drain output pin can be used to drive an external LED as a charging indicator. The AAT3696 has two charge termination mode selections when the battery voltage has reached the constant voltage level VCO(REG) and the charging current has decreased the termination current level. The AAT3696 offers a 4.9V/30mA LDO linear regulator. This regulator is enabled all the time regardless of the status of the charger and protected by the OVP switch. The AAT3696 is available in the Pb-free, thermally enhanced, space-saving 3x3mm TDFN33-12 package and is rated over the -40°C to +85°C temperature range.

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    • USB or AC Adapter System Power Charger
    • 3.0V ~ 6.5V or 6.05V Input Voltage Range
    • 2.8V Typical Under-Voltage Lockout Threshold
    • Fast Over-Voltage Protection Turn Off
    • Two OVP Turn-On Delay Time Options: 40μs, 80ms
    • Two OVP Trip Point Options: Protection Trip at 6.75V, Protection Trip at 6.25V
    • High Level of Integration with Internal: Power Device, Reverse Current Blocking, Current Sensing
    • 4.9V/30mA LDO Output Through Over-Voltage Protection Device
    • Programmable Current from 100mA to 1.6A Max
    • Charge Status Indicator
    • Automatic Recharge Sequencing
    • Automatic Trickle Charge For Battery Pre-Conditioning
    • Emergency Thermal Shutdown Protection
    • Power on Reset and Soft Start
    • Active Low Enable with Internal 200kΩ Pull-Down Resistor
    • Two Charge Termination Control Selections Manual: Continuous Battery Charging Until Charge Termination by Enable Pin
    • Automatic: Battery Charging is Terminated with Transition to Sleep State
    • 12-pin 3x3mm TDFN Package

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Features Similar products
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Linear Mode Yes  
Number of Cells 1  
Int/Ext FET Int  
Vcc Range (V) 3 to 6.5 / 3 to 6.05  
Voltage Regulation Accuracy (%) 0.5  
Temperature Monitor Yes  
Charge Safety Timers Yes  
Max Thermal Regulation Yes  
Operating Temperature (°C) -40 to +85  
Package TDFN33-12  
Cell Voltage (V) 4.2  
Max. Charging Current (mA) 1500